Device for exact registration of sheets of paper, pasteboard, and the like.



' e. SPIESS. DEVICE FOR EXACT REGISTRATEON 0F SHEETS OF PAPER, PASTEBOARD, AND THE LIKE.

RPPLICATION FILED JULY ZZ, IQ\51 Patented Jan. 7, 1919;

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enone srrnss, or LEIPZIG, GERMANY.

DEVICE ron EXACT nners'riae'rron or srinnrsor PAPER, rAs'rnnoAnn, AND THE LIKE.

Specification of Letters Patent.

rammed Jan. v, 1919.

Application filed July 22, 1915; Serial No. 41,226.

To all whom it may concern:

Be it known that I, Gnone SPIEss, a citizien of the German Empire, residing at Leipzig, in the Kingdom of Saxony, German Empire, have invented certain new and useful Improvements in Devices for the EX- act Registration of Sheets of Paper, Pasteboard, and the like, of which the following is a specification.

In the printing of sheets and, more particularly, in multi-color printing the precise registration of sheets as they are fed to the printing press depends to a very great extent on the sharpness of the edges of the sheets. During the transportation of the piles of sheets while being worked up it frequently occurs that the edges of the sheets are bent in or upset. Even sheets of the best quality of paper are liable tobe so damaged and when thin sheets had to be worked up it was almost impossible to avoid wastage due to this cause. By the introduction of offset presses, more particularly, for multicolor printing running at high speed it was found that the means hitherto. employed for the precise registration of thin sheets have failed completely and much wastage was experienced particularly in the production of labels.

The present invention has for its special object to avoid the described defects. It consists in the provision of a movable friction plate by means of which each sheet is flatly pressed down upon the table after which it is seized by grippers of the ma chine and drawn from between the plate and the table toward the registering stop or steps. The weight of the plate need obviously not be great and according to the quality of the paper sheets used may be greater or smaller as desired.

The invention is illustrated by way of example in the accompanying drawings, in which Figures 1 and 2 show in elevation the principal parts of the device used according to this invention in the two extreme positions Fig. 3'is a top plan view, and

Fig. 4 a lateral elevation thereof.

The grippers above referred to consist of two jaws A and B of which-the lower jaw A is arranged in a recess in the feed table C while the upper jaw is movably located above the same. The upper jaw B is also rotatable..- For the actuatio of the grippers use is made of two rods D and E which are rigidly connected by a bar F. The longitudinal displacement of these rods is effected by arocker G having slotted arms of which one embraces a pin H secured to the lower rod D; i

l'Vhile the gripping jaw A. is adjustable on the rod D, the upper jaw B is pivoted to a bell crank lever L, which in turn is pivoted to an arm I the hub of which is adjustably secured on the rod E. For the purpose of opening and closing the gripping devices the arm I is provided with an angular lever K,

N of which one arm N projects into the path of abutment-s P P on a bar 0. The lever arm L is provided with a cam face for actuating the roller arranged on the free end of the arm K and with a recess M adapted to receive that roller in a certain position. Intheposition shown in l ig. 1 the gripping jaws A, B are shown closed and the arm K bears on the straight cam face of the arm L.

As the grippingdevice is moved in the direction of the arrow shown in Fig. 1 the shank Mstrikes the abutment P as shown in Fig. 2 and the roller on the end of the shank K drops into the recess M below the cam face in the arm L while the upper jaw B is caused to be opened.

Arranged in front of a stationary registering stop piece Q i a platelt which is adjustable with regard to the table surface so that it may be moved down thereon as soon as a sheet 5% is brought beneath it. By the weight of this plate R the sheet is thus held down on the table with a certain amount of friction. This being done, the grippers A, B become operative and in overcoming the friction, draw the sheet precisely against the stop Q. As the grippers A, B themselves hold the sheet only by friction it is withdrawn therefrom as soon as it encounters a resistance sufiicient to overcome the friction of the sheet between the gripping jaws A, B. This resistance is offered to the sheet by the stationary registering stop Q, against which the sheet is thus caused to bear by its front edge.

For the purpose of raising and lowering the plate R, use is made by preference of the movement of the gripping jaw B. To this end, in the example shown, a rod T is arranged above the pivot or upper end of the gripping jaw B and at the same time projects through the suspension member U hich carries the plate R- lhus, as the gripping jaw B is raised for opening purposes, as shown in Fig. 2, the plate R is raised and held suspended above the table in order to enable the sheetsto move in. As soon however, as the gripping jaw B is moved down into the closing position the plate R is free to descend upon the sheet, as shown in Fig. 1.

I claim as my invention:

1. A machine for the exact registration of sheets of paper, paste-board and the like comprising a table with a registering stop thereon, a gripping jaw and a movable plate coacting therewith in front of the said stop, said plate being arranged to automatically descend upon each sheet and press it by friction against the gripping jaw with its own Weight, and means adapted to overcome the friction and draw the sheet to its exact position against the registering stop.

2. A machine for the exact registration of sheets of paper, paste-board and the like comprising a table with a registering stop thereon, a movable plate: in front of the said stop arranged to automatically descend upon each sheet and press it by friction against the table, and a gripping device. composed of a gripper jaw and a movable upper plate resting with its entire bottom surface upon the sheet by its own weight, adapted to overcome the friction and .draw the sheet to its exact position against the registering stop.

3. A machine for the exact registration of sheets of paper, paste-board and the like comprising a table with a registering stop thereon, a movable plate in front of the said stop arranged to automatically descend upon eachsheet and press it by friction against the table, anda gripping device composed of a gripper jaw and a movable upper plate holding the sheet by friction, and means for moving the gripping devices with sheets of paper, paste -board and the like comprising a table with a registering stop thereon, a movable plate in front of the said stop having a vertical support, a horizontal bar secured to the support, and a gripping device composed of a gripper aw and a 1novable upper plate supporting the adjoining free end of the horizontal bar whereby the plate before the stop is automatically raised and lowered.

5. A machine for the exact registration of sheets of paper, paste-board and the like comprising a table with a registering stop thereon, a friction plate in front of the stop, a grippng device composed of a gripping jaw and a movable upper plate, longitudinally movable rods arranged above and below the said table for actuating the gripping device without impeding the passage of the sheet.

6. A machine for the exact registration of sheets of paper, paste-board and the like comprising a table with a registering stop thereon, a friction plate in front of the stop, a gripping device composed of a gripping jaw and a movable upper plate, longitudinally movable rods arranged above and below the said table for actuating the gripping device without impeding the passage of the sheet, and a rocker having slotted arms for operating the said rods.

Signed at Leipzig, Germany, this -ith day of May, 1915.

GEORG SPIESS.

Witnesses RUDOLPH FRICKE, ERNA SCHMIDT.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents. Washington, D. 0. 

